My 40th birthday gift to myself was deteriorating eyes and arthritis in my hand. For my 41st birthday, I gifted five pounds of posterior "giggle" when I run. I was thanking my lucky starts that I had donned a t-shirt long enough to cover this movement when the song "Forever Young" came on my ipod. (I share an account with the girls). I thought it was quite humorous. Of course, when you are oxygen deprived, many normal things are funny.